Poultry house



' Dec. 14, 1.948. .1. D. BURKHOLDER, JR 2,456,489

POULTRY HOUSE 5 Sheets-Sheet 1 Filed April 28, 1945 K .lD urikoldeiyjitDec. 14, 1948. J. D. BURKHOLDER. JR 7 2,456,489

POULTRY HOUSE Filed April 28, 1945 v 5 Sheets-Sheet? JD Bus/wow y 1943-J-DQBURKHOLDER, JR- 2,456,489

POULTRY. aqusn Filed April 2a; 1945; sweets-sheet a Dec. 14; 1948. I J.D. BURKHOLDER, JR 2,456,489

POULTRY n ous Filed April 28, 1945 S'S heetS-Sheet 4 JaBw/a'zdde Jn m WWDec. 14, 1948. .J. D. BURKHOLDER, JR 2,456,489

I POULTRY HOUSE I Filed April 28, 1945 5 Sheets-Sheet s 2] Wu wwto'r/JDBurK/boZder; 1.1;.

Mow;

Patented Dec. 14, 1948 I, UNITED STATES PATENT OFFICE POULTRY HOUSE JohnD. Burkholder, Jr., Harrisonburg, Va.

Application April 28, 1945, Serial No. 590,758

, 6 Claims. 1

My invention relates to a poultry house and has particular reference toventilating means for the same.

An important object of the invention is to provide means for opening andclosing a large number of ventilator sashes for controllingtventilation,which means'may be operated by a relatively small source of power. I

A further object of the invention is to provide means for opening alower ventilator sash to an inner upwardly inclined position, and aventilator arranged near and above the ventilator sash to an outerdownwardly inclined position.

A further object of the invention is to provide a lower ventilatorsashand an upper ventilator arranged near the ventilator sash, which whenopened, will permit of fresh air entering the house and deflectedupwardly to avoid a draft, while the warm or stuffy air within the housedischarges from the open ventilator and which will prevent wind blowingdirectly into the building and will also exclude rain or snow.

- A further object of the invention is toprovide automatic temperaturecontrol means which will set the motor into operation for closing andopening the ventilator elements, for maintaining the temperaturesubstantially constant.

A further object of the invention is to provide operating meansforopeningand closing a large number of ventilator sashes in a longbuilding, by means of a long rock shaft, actuated in a manner to preventthe same tending to be twisted.

A further object of the invention is to provide ventilator elementsarranged in a plurality of stories in the house, and operating theventilator elements in one story and the ventilator elements in theother story from the first set of ventilator elements.

A further object of the invention is to provide ventilator sashes, whichare auxiliary to the main ventilator sashes, foraffording added oremergency ventilation. I

A further object, of the invention is to provide means for preventingthe auxiliaryventilator sashes being opened While the main ventilatorsashes are closed, which means is adjustableto permit the auxiliaryventilator sashes being opened while the main ventilator sashes areclosed.

A further object of the invention is to provide Winding means foropening a number of ventilator sashes in difi'erent stories of thehouse, which means is actuated by a common rotary element.

Other objects and adventages of the invention will be apparent duringthe course of the following description.

In the accompanying drawings forming a partof this application and inwhich like numerals are employed to designate like parts throughout thesame,

Figure 1 is a perspective view of a poultry building having myventilating means applied thereto.

Figure 2 is a central vertical longitudinal section taken on line 2--2of Figure 1,

Figure 3 is a horizontal section taken on line 33 of Figure 2,

Figure 4 is a transverse vertical section taken on line 44 of Figure 3,

Figure 5 is a view similar to Figure 2, upon an enlarged scale, partsomitted, showing companion upperand lowerventilator units or windows,

Figure 6 is a vertical section taken on line 6-6 of Figure 5,

Figure 7 is a perspective view of the companion upper and lowerventilator units removed, and the operating unit,

Figure 8 is a plan view of the operating crank and associated elements,parts in section,

Figure 9 is a side elevation of the operating crank,

Figure 10 is a transverse section taken on line Ill-40 of Figure 9, theoperating crank being in the position to open the mercury switch,

Figure 11 is asimilar View, taken on line I II| of Figure 9, theoperating crank being in the position to open the mercury switch,

Figure 12 is an end elevation of the operating crank, the associatedelements being in side elevation, and,

Figure 13 is a diagrammatic view of a circuit for controlling theoperation of the motor which drives the operating crank.

In the drawings wherein for the purpose of illustration is shown apreferred embodiment of my invention, the numeral I0 designates apoultry building which may be a long building, such as from 150 to 200feet long. This building has an upper story I I and a lower story l2 andan attic I3. Each story is provided upon one side of the building with aplurality of ventilator units or windows [4. In each story theseventilator units I4 are arranged in spaced relation in a horizontalgroup, and the ventilator units in the upper and lower stories arespaced and are arranged in vertical companion units or pairs, theventilator units in the vertical companion unit or pair being preferablyin alignment. Each ventilator unit [4 comprises a window frame IS, in

tilator sashes I6 in the vertical companion group.

Each upper pair of ventilator sashes IB are vertical when closed andopen inwardly, Figure-:65, and are substantially horizontal when in theopen position.

4 connected with the lower end of the lever 32 at 35. The link or rodsection 34 is slidable within a companion tube 36 and has spacedapertures 31 for receiving a pin 38. The rod or link section 34 may belongitudinally adjusted within the tube and locked thereto by the pin 38in the selected adjusted position. The numeral 39 designates an operatincrank rigidly mounted upon a shaft 40 and rotating with and about theshaft. The crank .313 hasespaced' apertures} 4.I'.-s-paced the samedistances as the apertures 31, and the apertures 4| receive a pin 42,passing through apertures 43 formed in the tube 36. The opera- .itingcrank or arm 39 turns clockwise, Figure 4,

Each lower pair of ventilator; sashes lfi m ayrbe';

equipped with adjustable latches or stops 20, pivoted to the same attheir tops and near their longitudinal centers by adjustable bolts 2|,and adapted tot he clampeda to the. lower; ventilator sashes I6 in theselected adjusted position; When. thoelatchesi 20o are iverticallyiarranged; they projEbti oven' theabottom' ends-of theupper pair ofventilator) sashes; I35: and: hence thes-- upper ventilator sashescannot be moved inwardly; totheopens position before i the: lower"ventilator: sashes IIBe-i-mtheecompaniongveritical; group-- are; open.These latches 20 may be adjusted to a horizontal, position. below; the.bottoms; of: the: pp r v n ilator sashes I8 and-it'hisywillpermit-pfithe opening movement: oi? the. upper: ventilator sashesindependently of the lower ventilator sashesl61in*theesamawerticaligroups, Each: pa r f upper ventilator sashes I8 isclosedzbyqgravitmandi to andomhis-closin perat o r positive; a flexible;element: 235 is ;;conne.cted with; each-;upper ventilator saslr; I 3;;near; its lower A or; free end, as.- h wm. a and asse abo t, ow r p ley24, fixed in the frame I5, and then overt-upper pulleys zg f gedg-lin?the frame: I5; and carries a stitobl W i h -1% his weish -i r es i thebox 25 of the frame I5.

Eaohdromolfi i st ro ide boveam ace to the tops; of the upperl'ventilator sashes I8 ithi oeti ator f m$$s th3 V-m s heir p i sidesopen. Each frame 26 includes a top 2.1. a.loatten ;7 23, Aventilator29..iseprovidedz for a hi ram 1.261 in ed 1. at s; o o. the top 21,sshewaotfifle ach-v n la i-opens outwardlypd; when in; the;- openposition,- it. is verticals ncl ne w ward When n; the closed position,the ventilatonls ,hasits; bottom projectin below. the bottom.. 28,,andewhen. the ventilator 2 G lso in .the. ,op en. position its bottom.overlaps the bottom 28, Figure 6, thus preventing. wind from. blowingdirectly, through the. frame zs mg the building. I The: ventilators =23.in ..ea.ch ventilator unit are positively opened. and, closed and. n ovein unison .with. theloWer.- ventilator sashes lIigi'nsuch.uni-t.

ArrangBdwithi-n the attic I.3: is a. horizontal longitudinal. shaft- 3-!preferably arranged. at .the. transverse; center of the; building;I,Il., Thisshafti is-.;m,o.unted in suitable. fixed bearings' and@Klimds. throughout. substantiall y.. the entire, lengthot the,buil'ding. I IL Tlriisshaftisapreferably tubular... andisrsufliciently ,largeor heavy. sojthat there will=,,be.no tendencyt f or it. totwist. Rigidlycgpneeted withthei, rockshaft, 3 I near, its- ,center, Elglliffl; is. along depending lever 32, fora increasing the leverage. Bivotally.connected .with the l'owe'r, end of the leverl 3Z.;is .a connecbi lgrod. i il'inkifit; sureseen hewnne t ne od or. link 3311slongitudinally; adjustable and in; eludes a tubular rodor link section34; pivotally with the shaft 40., and this shaft 40 is driven by amotor43' through the medium of suitable speedreflHGiZl;gearing,4L Byhaving the connecting rod or li nk 33 adjustably connected with theoperating crank or arm 39, the effective throw of the crank 39 foropening the ventilator elements: may beeadziusted; and; by having the;rod

orilinhs33rzlongitndina llnadjustable; the; operating:

crank or arm 39 will properly close theventilatorelementsewhenfitsiopening. throw-is .thuss adjusted.

Disposediin eachaStQmrI-I i and: Hen-ear; the: tops.

of?theeuppen-sasheventilators I 8'; is; a rock shaft;

453-; extendingzithroughoutisubstantially the entire: length of thebuilding I0, and-.jpurnalledjn suitable;fixcd;;bearings; This roek shaftis cf-smaller diameter: than. the; roclgshaft-,3l and! the. rock shaft;455 might: tendrto i twist; if power were: ap-- plied rtherletm atronepoint only. v In order to. avoid a y twistinaitensl noyeth hearnm kshaft is:providedzatzintfirllals such as:;3.0. feet apart,

- with-upstandinggcrankssw, ,liidly secllred theretolaiwotedito-eachscranln 46; ctr-46?: iswaeconnecting-i rod? onfilament-cs3 4*: and; 7,- pivoted to. the,

upper; end; of. a; vele- '82 Theses levers 4 a e:

also? arrangfidz 30.1; feet apart; and; in transverse alignmenttwiththe-cranks; 46:. Therlever. 48siss pi tal y swpportedzbetween, ts ndsr ya-fi pivot 49. The lower end ot; each= lever.- 48 is.pivotallyrconnectecbat:.48?" witmwon erod limo: 50'. imturm pivota lyr tnn d' with: a?

craaakzBzI easa hown fittBjEfi The. 0rank-15-l iis: rigidly;mountemupomtheeupnenrock shaftr45 Amumber of horizontaliorwkse 52;;corresponding-- numben' andsarraneem ntttoethe ran s 512 a merely-:mounted-1:11pm: the uoper: Tools t a enendine onnectmarodrorz nki531 s-pta 1y connected: withltheecrankriivat; 53.2,;andsextends :58.ofvlthisoperating loopoperates within vertical elonsated'strans r o sfilirisidlyattachedito the; sides. of; the, pairs. of ventilator sashes I I6. Tbe eoons .liaroar.ra eedi diac nt.to he t s of the lower ventilator sashesI6 and terminate tfl hetops hasamer. W n t pp rati al p n tanl: 51s.swunainwardly, the.wi spe v pair, of, venti ato B'I move war y t h'eooenposit o Connectedjwith each rock shaft 45"; adjacent to each ventilator"unit: are upstanding cranks 58, rigidly'secured thereto, and pivotallycon-u nected at 58 with links or 'rods 59,- in turn hinged to theventilators 29, as shown at 60.

When the lower ventilator sashes I6 in each ventilator unit isswun'g.downwardly; or inwardly, the correspondin ventilators 29' aresimultaneously swung upwardly and outwardly.

The upper ventilator sashes l8 of each ventilator unit are raised byflexible elements or ropes 6!,attached thereto by devices including ayieldable breakable element 62, such as a section of rubber. This rubberis sufiiciently strong so that it will not break under normal operatingconditions, but will yield so that the ventilatorsashes will closetightly but will break if excessive pull is applied thereto, thuspreventing the upper ventilator sashes being broken. The ropes 62 passover pulleys 63 and then extend to a rotary shaft 64, suitably mountedwithin the upper story of the building and extending throughoutsubstantially its entire length. The ropes 62 are attached to the rotaryshaft 64 and are wound thereon. When the shaft 64 is turned in onedirection, the upper ventilator sashes it in the upper story will beswung inwardly and opened, and when the shaft is turned in an oppositedirection, the ropes 6I will'be payed out and such ventilator sashes I8will be lowered and returned to the closed position. There is a pair ofropes 6| for each pair of ventilator sashes in. the upper story. Eachpair of upper ventilator sashes in the lower story is raised by flexibleelements or ropes 65, attached to their lower ends by devices 65'embodying sections of rubber. These devices 65 are identical with thedevices 62 and'are used for the same purpose. The ropes 65 pass upwardlyand extend over pulleys 66 and then extend further inwardly and passover pulleys 61, and then converge outwardly toward the ventilator unitand are connected with a link 68 or the like, attached tcasuitable rope69, passing over a pulley I0. These several pulleys are suitablysupported, as is obvious. The rope 69 then passes upwardly through avertical pipe I2 extending between the upper and lower story and thenover a pulley I2, and'then extends to the shaft 64 and is wound uponthis shaft. It is thus apparent that the upper and lower sashes I8 ofeach vertical pair of ventilator units at the upper and lower floors aremoved in unison for opening and closing. There is a pair of ropes 65-foneach pair of ventilator sashes I8 in the lower story. The shaft 64has a gear I2 rigidly mounted thereon driven by a motor I3, through themedium speed-reducing gearing I4. 1

The operating arm 39 is turned clo-ckwis Figure ,4, and Figures 8 to 12inclusive, by means of the motor 43.

As more clearly shown in Figure 9, the numeral 74 designatesone lead ofan alternating current circuit and I the other lead. A primary coil 16of an induction coil is connected with the lead I4, at IT, and to thelead I5 at I8.- The lead I4 is connected with one terminal of the motor43 and a wire 19 is connected with the opposite terminal of the motor,and isconnected at 80 with a stationary contact 8| of a switch or relay82, including a movable contact 83, which is biased open and connectedwith lead 15 at 84; A solenoid is provided to move contact 83 intoengagement with contact BI, and this solenoid includes a core 85 and acoil or windin 86, having a current induced therein from the winding I6.One:end of the secondary winding 86-is connected witha wire .81,connectedat with a oi-metal thermostatic element 89, carryin 281double-ended contact 90.: The thermostatic ele-.%-

ment 89 is acted upon by the heat withinthe building I0 and may bearranged in any suitable position therein. The opposite end of thewinding 86 is connected with a wire 90, and thiswir'e is connected with.one terminal 9| of a mercury switch 92. The other terminal 930i this mercury switch is connected with a wire 94, connected with a coldstationary contact-95. The

between the contacts 95 and I02 and may disen-- gage both of them oralternately engage either.-

Each mercury switch is of the conventional type embodying a glassenvelope containing mercury which receives the down-turned ends of theterminals therein for forming an electrical connection between them whenthe mercury switch is horizontal, and which breaks the electricalconnection between the terminals when the mercury switch is inclined sothat the mercury rolls away from and out of contact with thedown-turnedends of the terminals. The mercury switches 92 and 99 are arrangedupon'that side of the operating crank or. arm 39 remote from theconnecting rod or link 33, so as not to be engaged thereby. .The mercuryswitch 92 is rigidly mounted upon a lever I 03, pivoted at I04 upon astationary support I05. The lever I03 is automatically swung to. aninclined position by a retractile coil spring I06 and a stop I0'Iis'provided to limit the swinging movement of the lever I03 by thespring I06. The mercury switch is transversely inclined with respect tothe lever I03, and when this lever is vertical, the mercury switch 92 isinclined and is open, and when the lever I03 is moved by the spring I06to the inclinedposition, the mercury switch 92 is horizontal and closed,At its lower end, .the lever I03 has a lateral extension I01, arranged.in the path of travel of the operating crank or arm 39.- The lever I03is disposed upon one side of the shaft 40, while a corresponding lever-I08 is arranged upon the opposite side of the shaft 40. The lever I08 ispivoted at I09 to a fixed support H0, and is moved from the verticalposition to the inclined position by a retractile coil spring I I I. A'stop II2 limits the swinging movement of the lever I08 by the spring.The lever I08 has the mercury switch 99 rigidly mounted thereon and thismercury switch is transversely inclined with respect to thelever I08, sothatthe mercury-switch is inclined andopen when the lever I08 isvertical and horizontal and closed when the lever is inclined. The 1everl08is provided at its upper end with a lateral extension I I3, arrangedin the path oftravel of theyoperating crank or arm 39. The levers I03and I08 are pivoted'to swing in a plane at right angles to the path oftravel of the operating crank or arm 39. Due to the action of thesprings I06 and III, the mercury switches 92 and 99 are biased closed.

The operation of the apparatus is as follows: The operating arm or crank39 rotates clockwise, Figures 4, 8 and 9, as stated. Whenthe crank orarm 39 is in the generally horizontal position to the left, Figures 4and9, the ventilator sashes I6 and the ventilators 29 are closed. Thelever I08 is now being held in the vertical position by the operatingcrank 39 and the mercury switch 99 is open. The lever I03 is nowinclinedages-(tease flfi willgbe closedtandz current will bedlidufiedfinr in"the; winding; 86; the! cirouit being; made :from one endiofitherwinding' flfittthrough twirewfltterminali iaterminal 93;; Wire: 9'1;contact; 95;. oonta-ot 90; thermostatic? element: 89,;twirev 8.! "and;bank? to winding: 86: When: this; occurs v the solenoid" is: energlzedand"! switch. 8-2 is closed; which: closes? thermotor circuit. In'thismotor circuitLcurr/enh HaSSEStthI O Hgh- WHG;14-mOtU1143 wirea 1: cont--ta-6t-M',.-c0ntact 83: andfz back to: wire: 15:. The motorr is thus: setinto: action and continues i to driver until: the crank 39*153movedxf'ora substam' tiall yy 180 to assumei the position: to) theright. When: this? 00 ouranth'e era-n16v 3 9i engages? leven I Mi and:holds'it in therver-tical position; whereby-mer cum/2 switch 92 isopened" a'ndz-the: motor oihcuit openedandzthe:motonstbpped: Itever-I08: is nowmove'dsby its spring to the inclined?positiom'andiitsrmercury:- switch is closedzz The-:ventilator sashes l6: and the:ventilators 2 9 are nowopen: and the:

building begins to cool: andv When' the: tempera titre dropssufiiciently; the-thermostatic element? Wwilliflrst disengage Contactintheniassumeran intenmediateposition and: them engage. contact: 12-.When contact 90' engagesicontaot I022, a circuit: will b'elolosedzt"o-drive the: motor: Eur! is agaiminducedtinx thewi'nding 863' whichisthennin: at closed circuit; mending wiric 905. wire 91;,terminah 98;terminal IOBL-vvirerliligccohtact I02; contact: 90;. andrwire: 81' backto thevwindina The solenoidtis energized: an'dithe motorroirouitvisi-thenwlose'd at contacts-.8111 and; 83 Wxhen' thee crank-:35agaim reaches the positions to the left: Figure". 9:, suchcrankholds=thes arm V0.35 in: the vertical positionand: mercury; switch:995 is opened; The: motor again stops-. andithe: ventila ton sashes Hiare: openiand the ventilators'29r are opemtand mercury switch 92 -isclosed. Tll'ie: cycle ofxoperation is then repeatedi- Itimawbadesired tomrov-ide;additionalrventilatlbn .andzthisz-mayr Be efiected: While the?lower ventilaton sashesiare opened, and the stops 2(t:"proj.ecti1rabove?- the same. This: isreffected: bwstar ting; the motor 13! so thattthe? shaft: 551 issv rotated and the several ropes Wound: thereonforsraising theiupper sashes [8a The operation. of thermoton' 13 is=-oontroileu' separatelyfrom the motor? 43:.. The sashes; 18 cannot, beopened! when" the: lower)" ventilatorsashes l6: are? closed and. the:stops 2411 project above the same: However; whenzthe'" stops Z0 dornotiprojeot above the lovverventtlaton sashes leather upper ventilator:-sashes? may b'e raised or opened whilethe lower:ventilator: sashes: areclosed The arrangement oft therloweh'ventilator sashes? l fivpe-nmitsof. theentrancerioffresmairrintb thas-tory near the floorwithouticreatin'g dflait' and while therfresh air isithus enrenngthennwen Dm tioni of: the", room; the: foul: onrheated air is leaving;vthe:- room near its top througlr themventilatorsi 29. The-:uperventilatbrfsashes't its pro-- vide'for additional orv emergenciyventilationn It: is to be understood thati'thefonmr of? my invention,-hereini shown and described is: to? be taken a as: a preferred: exampleof; the same and that; various changes intt-he. shape, size; and; arerangernent of-. parts may be resorted: tofiwithout departing; fromtherspiriti of invention a or. the: scope oi: the subjoined clad-11152Having: thus cleser-iloectv my? invention what. I: claim is:

12 A1 poultry-house: having; upper: and; lower stories}; az pluralitt onpairs- 01- lower. ventilator: sashes for eaehastoryarrangedatuoneasideofithet house; means to: pivota-lly sup'piortteach. pal-r of ventilator? sashese a1 plurality? of 5 pairs: of:Venti:-- latorsiforrea'chstory'arranged above the ventilator" sashesandat thesame side; antherhouse the pairs on ventilator. sashes; of the?two? stories"- and the pairs-70f! ventilators; of: the: two stories.forming; vertical' unitsi,, at genenally horizontalrock-f shaft.

' extending:longitudinallykwithin the upper: storyadjacent to! the:pairs; of' ventilator;- sashes; der-- pendingorankstoorresponding'.imnumbert and art-- rBng-ement torthe palmsofrventilaton sashes inthe; uppers-story a-nclw c'omiectedi with: suchpairs of:

A v ventilator sashes: amn mounted upon: the; rock:

shaft,'. pairss ofl' cranks: connected with: the rock? shaft andcom'espondingwintnumber and arrangeem'e-ntrtoi the ventilators ofr the'upperstory; 7 means connecting; the: pairs of." cran'hswithfihe'pairszof:

,' ventilators. generally: vertical cranks mountedi up'orr rock shaft;anddepending: therefromi andzarra'ngerllinispaced ixelati ontthereto,generally vertical operatingalevers pivotallw supportedv be?tweentheihiends: and corresponding, in number: and'zarrang-ement tothegeneraily 'vertical cranks;. means -oonnecting;the lower endsao'fithegenerally: vertiealroperatingrleversiwithathe:generalln'vertioalroranksna mainoperatingaroek:shaftxextending: longitudinally;-Withinithe: upper stoi generally;

; verticahoranks mount'edtupon thetmaimoperatinge roe]; shaft, linkstonneotingthezlast named" gem era-11y? vertical cranks andthetupper:ends: oil the' operating, levers, a1 lever mounteduporn thermaintoperating; rock shaft. and 1 longerrthan: the: cranks; carried thereby,means tomouemhalast-named; lever, -a-.generailly horizontal rock tshaitextending longitudinally: withim the" lower: story near' the;ventilator. sashes; generally vertical". cranksi mounterl: upon? thelast-named rock. sh'a-ft: anti:

oer-responding; inlenumber and. arrangement to? the-pairs of!ventilator:- sashes of; the: lower: story; andwoonneotedi therewithpairs' of; genera-11y: ver ticali cranks mountedw upon: the: last-namedirock-- shaf t and; come'spondinggin' numben'an'd arrange erallyhorizontal. crankssmount'edi upon the: rock shat-.,oflthe:1ower storyand. corresponding in numben and: arrangement: to" the generally? horizontal cranks of the upper storyhandilinksmomneotingrthei generallyhonizonta-l' cranks oi the upper storyiw-ith ther generallyhorizontaizoranlt's' ofttheelowen story! A-.pou1try-h-Duse having: aroom; ax ventilator sash lama-need njearttlie bottomof ithemoomt meanstozpivotally supporotheventilat'on'sasht mean-its bottom: so-thatt itmaybe swung: vertically in.- wardly'toza vertically. inclined: position;amupp'en ventilator: arranged above;- the* ventilator: sash; means forpivota-ilysupporting-3 the'uppe ventiilaton' neanitstOptS'O- that itmay," be swung Ver tically outwardly to at c1awnW-ardly inclindtp'ositiontva guideielement attached: to. the ventilatoh sashra-nd having;atvertically elongatedropemngt a substantially horizontal-r rook.vvshart arranged: above: the ventilator-- sasln. at depending: crankmounted": upon itherroelrusliaftrand having a part? arranged within theelongated opening 6f the 3. A poultry house having a room, ventilatorsashe's" arranged near the bottom of the room, rneans to pivotallysupport the ventilator sashes "near their bottomsso that they may beswung vertically inwardlyto a vertically inclined position, guideelementsattached to the ventilator sashes'and and havingverticallyelongat'edopenings, upper ventilators'ar'ranged above theventilator sashes, means for pivotally supporting the upper ventilatorsnear their tops so that they may be swung vertically outwardly to adownwardly inclined position, a substantially horizontal rock shaftarranged above the ventilator sashes, depending U-shaped cranks securedto the rock shaft and having substantially horizontal portions pivotallydisposed within the elongated openings of the guide elements, crankmeans connected with the rock shaft and profecting above the,

same, links connecting the crank means and upper ventilators, and meansto turn the rock shaft.

4. In a poultry house, a plurality of pairs of lower ventilator sashesarranged at one side of the house, means to pivotally support each pairof ventilatorsashes at their lower ends so that they may be swungvertically inwardly to an open position, a plurality of pairs of upperventilators arranged above the ventilator sashes, means to pivotallysupport each pair of upper ventilators r at their upper ends so thatthey may be swung vertically outwardly to an open position, asubstantially horizontal rock shaft extending longitudinally of thehouse and arranged near the ventilator sashes, crank means mounted uponthe r rock shaft near each pair of ventilator sashes and connected withthe ventilator sashes to open and close the same, crank means mountedupon the rock shaft near each pair of upper ventilators and connectedwith the upper ventilators to open and close the same, a plurality ofdepending cranks mounted upon the rock shaft in spaced relation, acorresponding number of operating levers pivotally supported betweentheir ends and arranged adjacent to the depending cranks,

means pivotally connecting the lower end of each operating lever withthe lower end of the corresponding crank, a main rock shaft extendinglongitudinally within the house, a plurality of cranks mounted upon therock shaft in spaced relation and corresponding in number andarrangement to the operating levers, links pivotally connecting the lastnamed cranks and operating levers near the upper ends of the operatinglevers, a lever mounted upon the main rock shaft and being longer thanthe cranks mounted thereon, and means to move the last named lever.

5. A poultry house having upper and lower stories, a plurality of lowerventilator sashes for each story arranged at one side of the house,means to pivotally support each ventilator sash, a plurality ofventilators for each story arranged above the Ventilator sashes and atthe same side of the house, the ventilator sashes of the two stories andthe ventilators of the two stories forming vertical units, a generallyhorizontal rock shaft extending longitudinally within the upper storyadjacent to the ventilator sashes, depending cranks corresponding innumber and arrangement to the ventilator sashes in the upper story 10and connected with'such ventilator sashes and mounted upon therock'shaft, cranks connected with the rock shaft and corresponding 'innumber and arrangement to the ventilators ofthe upper story,meansconn'ecting thefcranks with ventilators, generally vertical cranksmounted upon the rock shaft and depending therefrom and arranged inspaced relation thereto, generally vertical operating leverspivotallysup- .porte d betwe en their ends corresponding innumber and arrangementto the generally vertical cranks, means. connecting the lower ends ofthe generally vertical operating levers with the generally verticalcranks, a main operatingsrock shaft extending longitudinallyfwithin theupper .storyg'generally vertical cranks mounted upon the main operatingrock shaft, links connecting the last named generally vertical cranksand the upper ends of the operating levers, a lever mounted upon themain operating rock shaft and longer than the cranks carried thereby,means to move the last named lever, a generally horizontal rock shaftextending longitudinally within the lower story near the ventilatorsashes, generally vertical cranks mounted upon the last named rock shaftand corresponding in number and arrangement to the ventilator sashesofthe lower story and connected therewith, generally vertical cranksmounted upon the last named rock shaft and corresponding in number andarrangement to the ventilators of the lower story, means connecting thelast named cranks and last named ventilators, a plurality of generallyhorizontal cranks mounted upon the first named rock shaft of the upperstory, a plurality of generally horizontal cranks mounted upon the rockshaft of the lower story and corresponding in number and arrangement tothe generally horizontal cranks of the upper story, and links connectingthe generally horizontal cranks of the upper story with the generallyhorizontal cranks of the lower story.

6. A poultry house having upper and lower stories, a plurality of lowerventilator sashes for each story arranged at one side of the house,means to pivotally support each ventilator sash, a plurality ofventilators for each story arranged above the ventilator sashes and atthe same side of the house, the ventilator sashes of the two stories andthe ventilators of the two stories forming vertical units, a generallyhorizontal rock shaft extending longitudinally within the upper storyadjacent to the ventilator sashes, depending cranks corresponding innumber and arrangement to the ventilator sashes in the upper story andconnected with such ventilator sashes and mounted upon the rock shaft,cranks connected with the rock shaft and corresponding in number andarrangement to the ventilators of the upper story, means connecting thecranks with the ventilators, a generally horizontal rock shaft extendinglongitudinally within the lower story near the ventilator sashes,generally vertical cranks mounted upon the last named rock shaft andcorresponding in number and arrangement to the ventilator sashes of thelower story and connected therewith, generally vertical cranks mountedupon the last named rock shaft and corresponding in number andarrangement to the ventilators of the lower story, means connecting thelast named cranks and last named ventilators, a plurality of generallyhorizontal cranks mounted upon the first named rock shaft of the upperstory, a plurality of generally horizontal crank-s mounted upon the rockshaft of

